Possible Clues:

• Clinton, e.g.: Abbr.
• Those people, in Brooklyn
• Like one side of an aisle: Abbr.
• J.F.K. or F.D.R., partywise
• Brooklyn pronoun
• Barney Frank, e.g., briefly
• Tester from Mont., e.g.
• F.D.R. or L.B.J.: Abbr
• FDR or RFK
• Party label